Fluid-pressure system.



PATENTED yMARZO. 1906.

P. E. CASE. FLUID fRBgSURE SYSTEM.

APPLmATIoN ruim) rma'. 24. 1903.

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Inventor v Frank E. Case.

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FRANK E. CASE, OE SCHENECTADK NEW YORK, AssieNOE To GENERA y f ELECTRIC COMPANY, A CORPORATION OE NEW YORK.

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1"0 all wh i/it 'molly-concern:-

. Be itlnotvn that-I, FRANK E. CASE, a citizen ofthe United States, residing at Schenec-y tady, 1n the County of Schenectady, State of New York, have invented lcertain new and useful Improvements -in l `luid-Pressure Systems, of which the, following is a specification.v l

Myvinvention relates 'to-,that class of fluidpressure s stems, such-'asfairebrake systems,

at a substantially uniform pressure bythe action of vsuitable' controlling means, part'of Which islelectrical in character; and it has for its Object the provision of electrically` actuated means responsive to variations of pressure inthe system for connecting `and disconnecting a compressor with a suitable driving me ans.`

One embodiment ofmy invention embraces l a suitably-incased compressor mounted on the car-axle, a reservoir for holding the compressed fluid, a governor responsive to variations of pressure in the system to open and close an electric Circuit, yand a magnetic clutchkeyed to said axle and adapted to throw the compressor into gear With the axle and inclosing case.

When the cireuit is closed, whereby when the car is in motion the compressor is actuated to furnish compressed fluid to the system. This embodiment is illustrated in the accompanying drawings, in Whichp' Figurel is a plan view showing one of the trucks of the car, the compressor, and other parts and diagrammatica ly indicating the .electrical connections and Fig'. 2 is a horizon.-v

tal s'ection of thecompressor drivinggear,

lReferring to the drawings, in Which like characters refer to like partsfA and B desi gnate the axles of a car-truck, and upon one of these, asA, is mounted an electric motor C, Vdapted to rotate the shaft A to propel the car. Upon the otherk axle B is mounted a suitably incased compressor D, which isv adapted to be driven directly from said axle.. The cylinderof the compressor is connected to the reservoir E by suitable piping 11v 12,

on the bot and the reservoir is provided Vwith a pipe 13.

leading to the lgovernor F. Since the'compresser is mountedfonthe truck and must.

necessarily move with it and thereservoir and main ipingordmarily will be mounted of the car, which has a separate Specification of'Letters Patent. Application filed rebmmyzt, laos. serial N0.144.,s67.

' and distinct movement from that ofthe truck, A

betWeen the compressor and the reservoir in the roper direction. l T- e governor F is here referred to only is substantially the same asthat disclosed in Patent No. 671,244, granted April 2, 1901, to S. B.` Stewart, Jr., and therefore need not be described -in detail in this application.

The' driving-gear of the compressor comprises a pinion 14, rotatably mounted on the axleB of the truck and geared with a tWo-Y casing 16 of the compressor and having its two parts firmly' connected by tliepin 17, to which is coupled' kthe connectiny rod 18, through which the piston of the cy inder 10 is actuated. The tWo parts ofthe gear 15, with the connecting-'pin17, form a Crank, which, together Withr the connecting parts, transforms the rotary `motion of the axle into-the reciprocating-'motion of the piston to supply compressed air to the system. y

The casing 16 is -made in t-Wo parts, Which may be separated to gain access to they instantially horizontal plane and are provided with ribs Sland corresponding grooves and With suitably-apertured flanges, so that they may be accurately' and readily positioned and bolted together. The ribs 37 are shown on the lower half of the casing 16, and the grooves into which they fit are located in th'e upper half.The casing '16 is sleeved upon the' axle B and extends up to'and isfconnected with the cylinder 10, so that all parts of ,the gearing are covered and protected,

Referring to vthe electrical connections, one terminal 21 of the governor F is connected by the Wire 19 with a suitable sourcelof supply, as the slu'ip'ly-Wire 20, by any suitable agency, as the trolley7 19a. The ot-herv terminal of the governor fis connectedby the Wire 22 with oneterminal of thefmagnetic clutch 25. y The other terminal of this clutch is provided with a ground connection G. The clutch comprises the Winding 25a, inclosed in the channeled core 26a, which is keyed to thiU l'raten/531 March 2o, 1906.

vided with a check-valve 12a to insure a flowv generally and is shown diagrammatioally. It'

part gear-Wheel 15, suitably journaled in the closed gearing. `These parts separate on a subsuitable insulated openings 35 35 for the as- -sage of the connecting-wires 22 and G, w ich are electrically connected to the `under side of the brush-holders. 24 and 26, res ectively. A resistance 27 is interposed in the ine 22 to cut down the amount of energy supplied to the clutch, so that a large rather than a small' wire may be used in its winding. From the above it will be seen that an eIectrical path is formed from the -wireI through the brushholder 24, brush 28, ring 30, winding 25, ring 31, brush 29, brush-holder 26 to ground. On the .side of the pinidfi 14 adjacent to the winding 25a is a late 32. A similar plate 36 incloses the win ing 25a in the channel ofthe core 26 and is adapted to bear against the plate 32. When the clutch-winding is energized, the plates 32 and 36 are drawn and held together, so thatl the pinion 14 will be held torotate' with the axle B.

The operation of the system will be readily understood from the above description. Assuming that the system is idle, with the pressure in all parts at that of atmosphere, the circuit embracing the clutch will be closed at 21 22. If current is then supplied, as by putting the trolley-wheel on the wire 20, the clutch will be actuated, and when the car is started the compressor will begin to supply compressed fluid to the reservoir E. en the pressure reaches the amount for which the governor has been set to respond, it will be actuated to open the clutch-circuit, thus stopping the compressor. When the pressure in the system again falls, the clutch-circuit will be again closed and the compressor again started.' By thus alternately starting and stopping the compressor the pressure 1n the system is kept substantially uniform.

What I claimas new, and desire to secure by Letters Patent of the United States, is-

1. In a fluid-pressure system, the combination oi' a compressor, means for drivin said compressor, and electricallyoperate means responsive to variations of pressure in the system to connect anddisconnect sa1d compressor and driving means.`

`2. In-a fluid-pressure` system, the com bination oi a compressor, means for driving said compressor, electrically-actuated means for connectin and disconnecting said compresserv and riving means, and .means responsive to variations of pressure `in the system for controlling the action of sa1d electrically-actuated means.

3: In a fluid-pressure system, the combinatlon of a' compressor means for driving sa1d compressor, an electricallyactuated clutch for connecting and disconnecting said lcompressor and driving means, and means responsive to variations of pressure in the system for controlling Athe action of said c utch.

4. In a fluid-pressure system, the combination of a compressor, means for driving sa1d compressor, a magnetic clutch for throwmg said compressor into and out of gear with sa1d drlving means, and a governor responsive to varlations of pressure in the system for opening and closing the circuit for said clutch.

5. In a fluid-pressure system, the combination of a car-axle, a com ressor mounted thereon and adapted to be diiven thereby, `a magnetic clutch for throwinof said compressor into'l and out of gear with said axle, a circuit for said clutch, and a governor connected in said system to operate upon a variation of fluid-pressure in said system and provided with means for opening and closing said circuit.

6. In a Huid-pressure system, the' combination of a car-axlea compressor geared to said car-axle and adapted to be driven thereby, and electrical means for lthrowing said corlnpressor into and out of gear with said ax e.

7. In a fluid-pressure system, the combination of a magnetic clutch, an electric circuit therefor, and means responsive to variations of ressure in the system to open and close sai circuit.

8. In a fluid-'pressure system, the combination of a car-axle, a compressor, gearin including a magnetic clutch for-driving sai compressor from sa1d axle, an electrlc clrcuit ior said clutch, and a casing inclosing said gearing and the movable parts of said compressor.

9. The combination of a motor, a pump, mechanism connecting said two elements including a clutch having means whereby it isV electrically operated, said mechanism being constructed to ermit said motor to run continuously, an e ectric switch in the` circuit of the clutch-operating device, and mechanism operated by variations in the condition of the fluid treated by the pump for opening and closing said switch and thereby throwing the clutch inte and out of action, substantially as described.

In witness whereof I have hereunto set my hand this 18th day of February, 1903.

FRANK iE. CASE.

Witnesses: p

.BENJAMIN B. HULL,

HELEN ORFORD.

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